Download of NZBin 1.2 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free Mac application is Xorox B.V. The program lies within System Tools, more precisely File Compression. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
NZBin is a fast and intelligent usenet NZB client for Mac. The tool supports RAR4, RAR5, ZIP, and 7zip archives. The tool features auto file extracting and offers to repair corrupt files. It provides handy functions, such as password detection while downloading and reverse file name correction.
You may want to check out more Mac applications, such as PDFcompressor, RAR Extractor Star or Password Zipper Lite, which might be similar to NZBin.